diff --git a/include/Algo/Render/map_glRender.h b/include/Algo/Render/map_glRender.h
index 1eda75e8e3f5fddea98cdd1df3797dee2895f08f..18cb002f1cb5f17b73b3948f3d2e56efb8f24009 100644
--- a/include/Algo/Render/map_glRender.h
+++ b/include/Algo/Render/map_glRender.h
@@ -71,7 +71,7 @@ void renderNormalVertices(typename PFP::MAP& the_map,
 
 template <typename PFP>
 void renderFrameVertices(typename PFP::MAP& the_map,
-		const typename PFP::TVEC3& position, const typename PFP::TMAT33& frames, float scale, const FunctorSelect& good = SelectorTrue());
+		const typename PFP::TVEC3& position, const typename PFP::TVEC3 frame[3], float scale, const FunctorSelect& good = SelectorTrue());
 
 } // namespace Direct
 
diff --git a/include/Algo/Render/map_glRender.hpp b/include/Algo/Render/map_glRender.hpp
index 409acc9fccf34923f6e311ab5914584c211d390f..cb0145211a0ccc954e25f83bcad9fd0ef092cf4e 100644
--- a/include/Algo/Render/map_glRender.hpp
+++ b/include/Algo/Render/map_glRender.hpp
@@ -183,7 +183,7 @@ void renderNormalVertices(typename PFP::MAP& the_map, const typename PFP::TVEC3&
 }
 
 template <typename PFP>
-void renderFrameVertices(typename PFP::MAP& the_map, const typename PFP::TVEC3& position, const typename PFP::TMAT33& frame, float scale, const FunctorSelect& good)
+void renderFrameVertices(typename PFP::MAP& the_map, const typename PFP::TVEC3& position, const typename PFP::TVEC3 frame[3], float scale, const FunctorSelect& good)
 {
 	FunctorGLFrame<PFP> fgl_frame(the_map, good, position, frame, scale) ;
 
diff --git a/include/Algo/Render/renderFunctor.h b/include/Algo/Render/renderFunctor.h
index 702c15f035792ccce8d80d6207d5284694f2fdd3..b1a5e0c18076dc8820e2182f1e0ee82f19e71e1e 100644
--- a/include/Algo/Render/renderFunctor.h
+++ b/include/Algo/Render/renderFunctor.h
@@ -255,7 +255,7 @@ protected:
 	/**
 	 * frame of vertices
 	 */
-	const typename PFP::TMAT33& m_frames;
+	const typename PFP::TVEC3 *m_frames;
 
 	/**
 	* Dart selector to restrict the rendering
@@ -269,7 +269,7 @@ public:
 
 	* @param good dart selector
 	*/
-	FunctorGLFrame (MAP& map, const FunctorSelect& good, const typename PFP::TVEC3& posi, const typename PFP::TMAT33& frames, float scale);
+	FunctorGLFrame (MAP& map, const FunctorSelect& good, const typename PFP::TVEC3& posi, const typename PFP::TVEC3 frames[3], float scale);
 
 	bool operator() (Dart d);
 };
diff --git a/include/Algo/Render/renderFunctor.hpp b/include/Algo/Render/renderFunctor.hpp
index 0aa4e3eb559d2b4381565f710691db64e61748ee..a96e68797817fd87fc116b2834916c936998cb68 100644
--- a/include/Algo/Render/renderFunctor.hpp
+++ b/include/Algo/Render/renderFunctor.hpp
@@ -362,7 +362,7 @@ bool FunctorGLNormal<PFP>::operator() (Dart d)
 }
 
 template<typename PFP>
-FunctorGLFrame<PFP>::FunctorGLFrame(MAP& map, const FunctorSelect& good, const typename PFP::TVEC3& posi, const typename PFP::TMAT33& frames, float scale):
+FunctorGLFrame<PFP>::FunctorGLFrame(MAP& map, const FunctorSelect& good, const typename PFP::TVEC3& posi, const typename PFP::TVEC3 frames[3], float scale):
 	FunctorMap<MAP>(map),
 	m_positions(posi),
 	m_frames(frames),
@@ -379,10 +379,9 @@ bool FunctorGLFrame<PFP>::operator() (Dart d)
 		typename PFP::VEC3 p = m_positions[d] ;
 		for (unsigned int i = 0 ; i < 3 ; ++i) {
 			glVertex3fv(p.data());
-			typename PFP::VEC3 q,vec ;
-			m_frames[d].getSubVectorH(i,0,vec) ;
+			typename PFP::VEC3 q ;
 			q = p ;
-			q += m_scale * vec ;
+			q += m_scale * m_frames[i][d] ;
 			glVertex3fv(q.data());
 		}
 	}